:root {
  --bg: #f4f7fc;
  --surface: #ffffff;
  --surface-soft: #eef3fb;
  --text: #1f2937;
  --muted: #5b6778;
  --line: #d7e1ee;
  --blue: #1f5fbf;
  --blue-dark: #174d9b;
  --red: #c32d3d;
  --red-dark: #9f2431;
  --success: #0f7a43;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 33, 56, 0.08);
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Inter", "Segoe UI", Roboto, Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
.container { width: min(1140px, 92%); margin: 0 auto; }
.site-header { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; }
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; color: #14386f; text-decoration: none; font-weight: 800; font-size: 1rem; }
.brand img { width: 44px; height: 44px; object-fit: cover; border-radius: 10px; }
.nav-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav-links a { text-decoration: none; color: #334661; font-weight: 600; border-bottom: 2px solid transparent; }
.nav-links a:hover,.nav-links a.active { color: var(--red); border-bottom-color: var(--blue); }
.menu-toggle { display: none; min-height: 44px; border: 1px solid rgba(31,95,191,0.25); background: linear-gradient(135deg, var(--blue), var(--red)); color: #fff; border-radius: 10px; font-weight: 700; padding: 0.4rem 0.8rem; }
.hero { background: linear-gradient(110deg, #1f5fbf, #417dd2 60%, #c32d3d); color: #fff; padding: 3.4rem 0; }
.hero h1 { margin: 0.5rem 0 0.7rem; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; }
.hero p { max-width: 72ch; margin: 0; }
.section { padding: 2.2rem 0; }
.section h2 { margin: 0.2rem 0 0.8rem; color: #123665; }
.section-lead { color: var(--muted); max-width: 75ch; }
.grid-2,.grid-3,.cards,.dashboard-grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.cards { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-top: 1rem; }
.card,.panel,.lesson-block { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem; }
.badge { display: inline-block; padding: 0.16rem 0.52rem; border-radius: 999px; background: #e6eefb; color: #154997; font-size: 0.84rem; font-weight: 700; }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; padding: 0.74rem 1.1rem; border: 1px solid transparent; text-decoration: none; font-weight: 700; cursor: pointer; }
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); }
.btn-secondary { background: var(--blue); color: #fff; }
.btn-secondary:hover { background: var(--blue-dark); }
.btn-outline { border-color: rgba(255,255,255,0.5); color: #fff; background: rgba(255,255,255,0.1); }
.lesson-toolbar { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.progress-wrap { display: grid; gap: 0.5rem; }
.progress-bar { height: 10px; border-radius: 999px; background: #dfe8f5; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--blue), var(--red)); }
.roadmap { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
.roadmap li { border-left: 3px solid #bcd1f0; padding: 0.48rem 0.7rem; background: #f8fbff; border-radius: 8px; }
.lesson-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 1rem; }
.download-list,.resource-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.45rem; }
.download-list a,.resource-list a { color: var(--blue-dark); text-decoration: none; font-weight: 600; }
.download-list a:hover,.resource-list a:hover { color: var(--red); text-decoration: underline; }
.test-answers { display: none; }
.test-answers.revealed { display: block; }
label { display: grid; gap: 0.35rem; font-weight: 600; color: #334155; }
textarea,input,select { width: 100%; font: inherit; border: 1px solid #cdd8e7; border-radius: 10px; padding: 0.65rem 0.75rem; background: #fff; }
.site-footer { background: #15263f; color: #eef4ff; padding: 2rem 0 1rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.site-footer a { color: #bdd8ff; text-decoration: none; }
.site-footer a:hover { color: #ffb7bf; text-decoration: underline; }
.copyright-note { margin: 0.8rem auto 0; width: min(1140px, 92%); border-top: 1px solid rgba(190, 208, 237, 0.34); padding-top: 0.7rem; text-align: center; color: #e8f0ff; }
@media (max-width: 920px) {
  .menu-toggle { display: inline-flex; }
  .nav-wrap { flex-wrap: wrap; align-items: flex-start; padding: 0.8rem 0; }
  .nav-links { width: 100%; flex-direction: column; max-height: 0; opacity: 0; overflow: hidden; pointer-events: none; transition: max-height .28s ease,opacity .2s ease; border: 1px solid rgba(31,95,191,.18); border-radius: 12px; padding: 0 .7rem; background: #f8fbff; }
  .nav-open .nav-links { max-height: 520px; opacity: 1; pointer-events: auto; padding: .7rem; }
  .lesson-layout { grid-template-columns: 1fr; }
}


.module-section {
  margin-top: 1.2rem;
  scroll-margin-top: 90px;
}

.level-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0.7rem 0 1rem;
}

.level-label {
  font-weight: 700;
  color: #1e365e;
}

.level-pill {
  border: 1px solid #bfd2ec;
  background: #f8fbff;
  color: #1a4f9f;
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-weight: 700;
  cursor: pointer;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}

.resource-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fcfdff;
  padding: 0.85rem;
}

.resource-card h3 {
  margin-top: 0;
  color: #143b75;
}

.module-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.phase-card { margin-top: 1rem; }
.phase-card h2 { margin-top: 0; }
.phase-card ul { margin-top: 0.35rem; }

.form-stack { display: grid; gap: 0.7rem; }
.timer-display { font-size: 2rem; font-weight: 800; color: var(--blue-dark); margin: 0.2rem 0 0.6rem; }
iframe { border: 0; border-radius: 10px; margin-top: 0.6rem; }

/* Responsive video wrapper used across lesson pages */
.video-wrap { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
.video-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

/* Audio playback control styling for recording playback */
.audio-playback { width: 100%; margin-top: .7rem; }

/* Larger typography for lesson content (used on Lesson 1 orientation) */
.lesson-large { font-size: 1.08rem; }
.lesson-large h1, .lesson-large h2 { line-height: 1.12; }
.lesson-large h2 { font-size: 1.6rem; }
.lesson-large p, .lesson-large li { font-size: 1.05rem; }

.skill-cards {
  margin-top: 1rem;
}

.skill-card h3 {
  margin-bottom: 0.35rem;
  color: #14386f;
}

.skill-progress-wrap {
  margin: 0.65rem 0 0.9rem;
}

.section-soft {
  background: #eef3fb;
}

.testimonials-grid .testimonial-card {
  border-left: 4px solid #b8cdee;
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-list details summary {
  cursor: pointer;
  font-weight: 700;
  color: #163a6e;
}

.faq-list details p {
  margin: 0.7rem 0 0;
  color: #334155;
}

.cta-section {
  padding-top: 0.4rem;
}

.cta-card {
  background: linear-gradient(120deg, #f8fbff, #eef4ff);
  border: 1px solid #c7d8f0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

@media (max-width: 680px) {
  .cta-card {
    padding: 1rem;
  }
}

.foundation-grid {
  margin-top: 1rem;
}

.foundation-card {
  border-top: 4px solid #adc5ea;
}

.foundation-card h3 {
  margin: 0.15rem 0 0.35rem;
  color: #183d74;
}


.course-layout-grid {
  margin-top: 1rem;
}

.course-layout-card h3 {
  margin: 0.2rem 0 0.5rem;
  color: #153a70;
}

.module-list {
  margin: 0.6rem 0 1rem;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.45rem;
}

.module-list li {
  color: #334155;
}

.module-list a {
  color: var(--blue-dark);
  text-decoration: none;
  font-weight: 700;
}

.module-list a:hover {
  color: var(--red);
  text-decoration: underline;
}

.sticky-skill-nav-wrap { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 74px; z-index: 20; }
.sticky-skill-nav { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0.65rem 0; }
.sticky-skill-nav a { white-space: nowrap; text-decoration: none; color: #163d74; border: 1px solid #c6d7ef; background: #f7faff; border-radius: 999px; padding: 0.4rem 0.85rem; font-weight: 700; }
.sticky-skill-nav a:hover { color: var(--red); border-color: #9db8df; }

.video-thumb img { width: 100%; border-radius: 10px; border: 1px solid var(--line); margin-bottom: 0.6rem; }

.skill-layout { display: grid; grid-template-columns: 1fr 260px; gap: 1rem; align-items: start; }
.skill-sidebar { position: sticky; top: 84px; display: grid; gap: 0.45rem; max-width: 320px; }
.lesson-sidebar-static { position: static; }
.skill-sidebar a { text-decoration: none; color: #204a84; font-weight: 700; padding: 0.35rem 0.2rem; }
.skill-sidebar a:hover { color: var(--red); }

.btn-outline-inline { background: #fff; color: var(--blue-dark); border: 1px solid #b7cae8; }
.btn-outline-inline:hover { border-color: #8eaed8; color: var(--red); }

@media (max-width: 920px) {
  .sticky-skill-nav-wrap { top: 62px; }
  .skill-layout { grid-template-columns: 1fr; }
  .skill-sidebar { position: static; }
}


.entry-grid {
  margin-top: 1rem;
}

.exam-entry {
  border-top: 4px solid #b9cdee;
}

.exam-entry-ielts {
  border-top-color: #c32d3d;
}

.exam-entry-toefl {
  border-top-color: #1f5fbf;
}

.exam-meta {
  margin: 0.25rem 0 0.55rem;
  color: #46556f;
  font-weight: 700;
}


.score-goal-card .score-grid {
  margin-top: 0.8rem;
  gap: 0.55rem;
}

.score-goal-card .score-grid > div {
  background: #f7faff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.5rem 0.65rem;
  font-weight: 700;
  color: #173e74;
}

.exam-entry-links {
  margin-bottom: 1rem;
}

.start-checklist {
  margin: 0.45rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

.resource-level-group {
  display: none;
}

.resource-level-group.is-active {
  display: block;
}

.level-pill.is-active {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue-dark);
}

.exam-tag {
  display: inline-block;
  margin-left: 0.35rem;
  font-size: 0.72rem;
  font-weight: 800;
  border-radius: 999px;
  padding: 0.08rem 0.45rem;
  vertical-align: middle;
}

.ielts-tag {
  background: #fdecee;
  color: #9f2431;
}

.toefl-tag {
  background: #e9f1ff;
  color: #1f5fbf;
}

.module-card .module-status {
  font-weight: 700;
  color: #334155;
}

.btn-disabled {
  pointer-events: none;
  opacity: 0.55;
  filter: grayscale(0.2);
}

.quiz-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  margin: 0;
}

.quiz-item legend {
  font-weight: 700;
  color: #193f73;
  padding: 0 0.2rem;
}

.module-pagination {
  justify-content: space-between;
  margin-top: 1rem;
}

.quiz-item label {
  display: block;
  margin-top: 0.45rem;
  font-weight: 500;
}

.quiz-explanations {
  margin-top: 0.8rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8fbff;
}

.do-dont-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.do-dont-box > div {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fcfdff;
  padding: 0.7rem;
}

.do-dont-box h3 {
  margin: 0 0 0.35rem;
}

.status-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  margin-right: 0.25rem;
}


.variant-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #1f5fbf;
  background: #e8f0ff;
  border: 1px solid #bfd2ec;
  border-radius: 999px;
  padding: 0.08rem 0.45rem;
  vertical-align: middle;
}

.band-icon {
  display: inline-block;
  margin-left: 0.2rem;
}


.module-pagination {
  position: relative;
  z-index: 6;
}

.module-pagination .btn {
  pointer-events: auto;
  position: relative;
  z-index: 7;
}

.question-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.question-type-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fcfdff;
  padding: 0.75rem;
}

.question-type-card h3 {
  margin: 0 0 0.35rem;
  color: #173f74;
}

.answer-key {
  margin-top: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8fbff;
  padding: 0.65rem 0.75rem;
}

.answer-key summary {
  cursor: pointer;
  font-weight: 700;
  color: #1b467e;
}

.quiz-item {
  margin-bottom: 0.65rem;
}


.quiz-item, .quiz-option {
  position: relative;
  z-index: 1;
}

.quiz-option {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.55rem;
  align-items: start;
  margin-top: 0.5rem;
}

.quiz-option input[type="radio"] {
  margin-top: 0.2rem;
  pointer-events: auto;
}

.quiz-option label {
  cursor: pointer;
  pointer-events: auto;
}


.module-card .btn {
  width: 100%;
  text-align: center;
}

.btn-disabled {
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .module-pagination {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }

  .module-pagination .btn {
    width: 100%;
    text-align: center;
  }
}


/* Ensure quiz controls remain tappable/clickable on mobile */
.quiz-item,
.quiz-item *,
.quiz-option,
.quiz-option *,
#checkAnswers,
#quizResult {
  pointer-events: auto;
}

.quiz-item,
.quiz-option,
#checkAnswers,
#quizResult {
  position: relative;
  z-index: 2;
}


.breadcrumb {
  font-size: 0.9rem;
  color: #35527a;
  margin: 0 0 0.75rem;
}